Script to clean expired build cache items

Change-Id: I5e466c89c05eb4d637778218cfe03b88d569f331
Signed-off-by: Stefan K. Berg <stefan.k.berg@ericsson.com>

diff --git a/ci/clean_cache.sh b/ci/clean_cache.sh
new file mode 100755 (executable)
index 0000000..177fe82
--- /dev/null
+++ b/ci/clean_cache.sh
@@ -0,0 +1,38 @@
+#!/bin/bash
+##############################################################################
+# Copyright (c) 2016 Ericsson AB and others.
+# stefan.k.berg@ericsson.com
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+
+# Clean the build cache according to its expiry date. Invoke with the cache
+# directory as the first argument.
+
+if [ -z "$1" ]; then
+  echo "No cache directory specified, exiting..."
+  exit 1
+else
+  CACHEDIR=$1
+  echo "Operating on cache $CACHEDIR"
+fi
+
+NOW=$(date '+%s')
+
+cd $CACHEDIR
+echo "Step 1, cleaning orphaned meta and blob files"
+ls *.meta *.blob | sed 's/\..*//' | sort | uniq -u | xargs -n 1 -I {} sh -c "rm -vf {}.*"
+echo "Step 2, cleaning expired files"
+for cache in $(ls -1 *.meta | sed 's/\..*//')
+do
+  blob=${cache}.blob
+  meta=${cache}.meta
+  expiry=$(grep Expires: $meta | sed 's/Expires: *//')
+  if [ $expiry -le $NOW ]; then
+     echo "$cache expired $(date -d "@$expiry"), removing..."
+     rm -f $blob $meta
+  fi
+done
+